<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div{
      width: 100px;height: 100px;
      border: 1px solid red;
    }
    div:hover{
        /*修改为相对定位*/
        position: relative;
        top: 20px;
        left: 20px;

    }
  </style>
</head>
<body>
<div>div1</div>
<div>div2</div>
<div>div3</div>
</body>
</html>